Heavy-oil vaporizer



HEAVY OIL VAPORIZER Original Filed Dec. 3. 1924 `Patented Feb. 7, 1928.

UNITED STATES 1,658,538 PATENT OFFICE..`

DAVID T. SCOTT, OF MITCHEIJLS ISLATTl),` SOUTH VANGOUVER, BRITISH COLUMBIA,

' CANADA.

HEAVY-OIL vAPoRIzna.

Drginal application led December 3, 1924, Serial No. 753,689. Divided and this `application med January 21, 1927.

ylhis invention relates to a means for va-` porizing a heavy oil for combustion in an internal combustion engine by the heat of the exhaust from the same. It comprises a means whereby the heat from the exhaust is applied to heat the oil and the air for its combustion before the former is` sprayed into the latter and thereafter to heat the explosive mixture of atomized oil and air before its delivery tothe intake of the engine.

These three requirements, the heating of the oil, the heating of the air for its combustion and the heating of the gaseous mixture of oil and air are effected within a single casting or body which is simple in construction, readily adaptable to existing engines andaccessible for cleaning or repair.

- The invention is fully described in the following speciiication, reference being made to the drawings by which it is accompanied, in which:

Figure 1 isa invention. i

Figure 2 is a plan of the same with the top cover removed.

In these drawings 2represents a relatively elongated rectangular body, to one end of which the exhaustkfrom the engine 1s delivered at 8, vand from the other end of which' it finds its exit at 4. The end of this body to which the exhaust is delivered is downwardly extended as at 5 immediately opposite the exhaust entrance 8 to below the general level of the body, and has in the bottom a compartment 6 divided from it to which the fuel oil is delivered at 7 from the float chamber 23 of the carburetter and from which the oil, heated by exposure to the exhaust, is delivered at 8 to the pocket 9 of the carburetter 10, which is the subject of a separate application filed on the 26th of August, 1924, under Serial No. 7 34,282 and now pending in the oiiice.

Immediately adjacent the end of the body .2 to which the exhaust is delivered, a passage 11 is carried vertically through the body, the lower end of which passage is connected to the carburetter 10 and the upper end of which is connected to the intake of the eneine. b From the end of the body 2 which is adjacent this passage 11 to the other end near the exit 4, a series of short tubes 12 pass vertically through the body, the ends of which longitudinal section of` the` Serial N o. 162,594.

tubes are expanded in the apertures provided for them in the upper and lower walls of the body. The air for mixing with the fuel oil vapor is .conducted through these tubes 12 where 1t is exposed to the heat of the exhaust as it passes through the body from 3 and 4.l

To ensure effective circulation of the air through these tubes 12 the ends, Where they pass through the walls ofthe body, are divided into groups 18, 19, 20 and 21, by flanges projecting from the top and bottom walls of the body on which flanges are seated cover plates 16 above and 17 below, leaving heading spaces 13, 14 and 15 successively connect-ing the several groups.

Atmospheric air is admitted to the lower y end of the first group 18 of these tubes and passes upward through them to the-heading space 18, from there downward through the tubes in the next group 19 to the heading space 14, upward through the next connected group 20 to the `heading space 15 and down ward through the last group 21 and is delivered at 22 to the earburetter 10 before referred to. Y

In this carburetter 10 the air, highly heatr` ed by its passage through the tubes 12, receives the atomiz'ed oil heated in the com partment G and in the pocket 9, and the combustible mixture of heated air and oil vapor passes through the pipe 11 where it is further heated by exposure to the heat of the exlhaust before its delivery to the engine inta re.

It will be noted that while the oil in the chamber 6 and the gaseous mixture in the pipe 11 are exposed to the high temperature of the exhaust gases as iirst delivered from the engine at 3, the air, passing through the tubes 12 from the end nearer the exhaust exit 4 toward the end to which the exhaust is first admitted at 3, is gradually heated un-` til in the group 21 it is just before its delivery to the Carburettor at 22 exposed to the hotter exhaust gases. After this hot air is mixed with the vaporized oil which has been highly heated inthe chamber 6 and pocket application Serial No.

753,689, filed by me December 3, 1924.`

Having now particularly described myfinvention, I hereby declare that Whatl claim as new and desire to be protected in by Letters Patent, is:

l. A carburetter of the class described, comprising the combination with an elongated cliambered body intofthe upper side of which at one end the exhaustfrom' an engine is admitted and from the other end of which it is allowed lto eseape,-said chambered body and the other end ot' the chambered body having a rplurality of groups oi' tubes extending across the chambered body, means foradmitting air into a group of these tubes at the end-toward the exhaust exit, means for connecting the `ends of the tubes ot adjacent groups `whereby the air maypass seriallythroughthe respective groups toward the endof the body Where the exhaust is admitted, means for passing the air so "heated to the delivery duct, means "for regulating by the suction of thel engine intake the amount `of hot air drawn into this duct, means fordelvering a supply of oil into the portion'ot 'the chamber' partitioned oit,

and means for delivering the oil therefrom into the heatedair `passing means adjacent the connection of it to the gas delivery duct.

2. A Carburettor of the class described, comprising the combination With an elongated chambered body through which the exhaust of an enginel is delivered from `one end tothe other, a subchamber partitioned oit adj acent'the end to which the exhaust is deliveryA duct and the other end of the chambered body, said tubes being divided into a number of groups,iand `means forconnecting theadjacentfends of the adjacent groups together whereby air admitted into the group adjacent 'the exhaust exit maypass successively through theseveral grou s toward the otherfend, a pipe delivering rt e heated air to thedeli-very duct, a `valve regulating by the `suction of the engine intake the amount of air indrawn, means yexterior `to the pipe for `varying the pressure `under `which `said valve acts, means for delivering oil to the sub-chamber, means 'for delivering `oil `from that sub-chamberto a lpocketin thewall of the heated air delivering :pi Je, and means for delivering the oil there rom `into "the heated air delivering pipe.

3. In a device of the class described,1neans for preheating the air by passing it throu 4h butV out of contact withexhaust gases, said means comprising anelongated hollow body having an exhaust gas intakeopening at one end and an exhaust gas discharge opening at its other end, `means adjacent the intake end of the body for delivering heated air to a carburetter intake, a plurality of `grou )s ofair tubes passing through the bodyysaid body having extended chambers with which the ends of pairs of tube groups communi cate, oneendof the tubes of the group nearest the discharge end of the body being open to atmosphere, and one end of the tubes of the 'group `nearest the body intake end discharging` into said heated air delivering means.

DAVID T.. SCOTT. 

